SmogRank / World / Japan / Osaka / October 2025

Most polluted cities in Osaka, Japan, October 2025

15 cities in Osaka, Japan ranked by their average PM2.5 over the 31 days. Worst: Higashiosaka at 7.4 µg/m³, #1,002 of 2,564 cities in the world. Cleanest: Yono at 4.6. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Higashiosaka 0% 0.75%0

Every city in Osaka, Japan ranked for October 2025, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.

1Higashiosaka
0%
2Kishiwada
0%
3Osaka
0%
4Sakai
0%
5Sennan
0%
6Izumi
0%
7Izumisano
0%
7Kawachi-Nagano
0%
9Yao
0%
9Tondabayashichō
0%
11Hirakata
0%
12Habikino
0%
13Sayama
0%
14Toyonaka
0%
15Yono
0%

Good0–50

Moderate51–100

Sensitive groups101–150

Unhealthy151–200

Very unhealthy201–300

Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, October 2025 · All cities in Japan, October 2025 · Osaka now

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SmogRank, most polluted cities in Osaka, Japan, PM2.5, October 2025, smogrank.com/jp/region/osaka/history/2025-10 (accessed 6 Oct 2026).

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